6663444554 has 48 divisors (see below), whose sum is σ = 10964188800. Its totient is φ = 3035672640.

The previous prime is 6663444551. The next prime is 6663444577. The reversal of 6663444554 is 4554443666.

It is a junction number, because it is equal to n+sod(n) for n = 6663444499 and 6663444508.

It is not an unprimeable number, because it can be changed into a prime (6663444551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10559819 + ... + 10560449.

It is an arithmetic number, because the mean of its divisors is an integer number (228420600).

Almost surely, 2^6663444554 is an apocalyptic number.

6663444554 is a deficient number, since it is larger than the sum of its proper divisors (4300744246).

6663444554 is a wasteful number, since it uses less digits than its factorization.

6663444554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1015 (or 1002 counting only the distinct ones).

The product of its digits is 4147200, while the sum is 47.

The square root of 6663444554 is about 81629.9243782573. The cubic root of 6663444554 is about 1881.7687964889.

The spelling of 6663444554 in words is "six billion, six hundred sixty-three million, four hundred forty-four thousand, five hundred fifty-four".